MAX1773 Просмотр технического описания (PDF) - Maxim Integrated

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MAX1773

Power Source Selector for Dual-Battery Systems

Maxim Integrated 

Power Source Selector for

Dual-Battery Systems

ELECTRICAL CHARACTERISTICS (continued)

(VBATA = VBATB = 16.8V, CVDD = 3.3µF, VMINV = 0.93V, VEXTLD = VACDET = 28V, VTCOMP = 3V, VTHMA = VTHMB = 1.65V,

VBATSEL = 0, CCOMA = CCOMB = CDISA = CDISB = CCHGA = CCHGB = CPDS = 5nF, TA = -40°C to +85°C, unless otherwise noted.)

DIS_ Sink Current (PMOS Turn-On)

DIS_ Turn-On Clamp Voltage

(VDIS_ to VEXTLD)

STATUS OUTPUTS

ACPRES Sink Current

BATSTAT Sink Current

ACPRES Leakage Current

BATSTAT Leakage Current

TRANSITION TIMES

Battery Switchover Delay

Battery Action Delay

Thermistor Action Delay

AC to Battery Switchover Delay

Battery to AC Switchover Delay

CHG_ Turn-On Delay

VEXTLD = 16.8V, VDIS_ = 11.8V (Note 5)

VEXTLD = 8V to 28V

VEXTLD = 4.75V to 8V

V ACPRES = 0.4V

V ACPRES = 5.5V

VBATSTAT = 0.4V

VBATSTAT = 5.5V

V ACPRES = 5.5V

VBATSTAT = 5.5V

VACDET = 2.2V, VMINV = 0.93V (Note 6)

VACDET = 2.2V, VMINV = 0.93V (Note 7)

VACDET = 2.2V, VMINV = 0.93V (Note 8)

VACDET = 2.2V, VMINV = 0.93V (Note 9)

VACDET = 2.2V, VMINV = 0.93V (Note 10)

(Note 11)

2

-11.50

-8.00

1

1

130

mA

-7.25

V

-4.25

mA

30

mA

30

1

µA

1

µA

5

µs

260

µs

12

µs

10

µs

260

µs

530

µs

Note 2: TCOMP undervoltage lockout sets the MAX1773/MAX1773A’s internal status bits for the batteries to be designated as

“absent” (VTHM_ > VTCOMP).

Note 3: VACDET must remain above 2.2V, except in power-up.

Note 4: COMA cannot sink current until VCOMB > VBATB - 2V. Likewise, COMB cannot sink current until VCOMA > VBATA - 2V.

Note 5: DISA cannot sink current until VDISB > VEXTLD - 2V. Likewise, DISB cannot sink current until VDISA > VEXTLD - 2V.

Note 6: Battery Switchover Delay starts when either VCOM_ or VDIS_ of the connected battery begins to rise and ends when both

VCOM_ and VDIS_ of the other battery have fallen 3V below their sources (Figures 1 and 2).

Note 7: Battery Action Delay starts when the connected battery’s voltage falls below 5 ✕ VMINV and ends when both VCOM_ and

VDIS_ of the other battery have fallen 3V below their sources (Figures 1 and 2).

Note 8: Thermistor Action Delay begins when VTHM_ of the connected battery rises above VTCOMP and ends when both VCOM_

and VDIS_ of the other battery have fallen 3V below their sources (Figures 3 and 4).

Note 9: AC to Battery Switchover Delay begins when VACDET falls below its threshold and ends when both VCOM_ and VDIS_ of the

battery being switched to have fallen 3V below their sources (Figure 5).

Note 10: Battery to AC Switchover Delay begins when VACDET rises above its threshold and ends when VDIS_ of the battery being

switched from has begun to rise (Figure 6).

Note 11: CHG_ Turn-on Delay begins when VCHG_ of the battery being switched from begins to rise and ends when VCHG_ of the

battery being switched to begins to fall (Figures 7 and 8).

6 _______________________________________________________________________________________

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